Energy-Saving Image Transmission over WMSN Using Block Size Reduction Technique

The advent of efficient short range radio communication coupled with advancement in miniaturization of computing devices has enabled the development of wireless multimedia sensor network (WMSN). Energy is one of the scarcest resources in such networks, especially it is scarce in transmitting multimedia data. This work presents an energy-saving pixel sub sampling of image blocks where pixels of each block of pixel array of the captured image are chosen symmetrically for transmission. At the high-end receiving node (e.g. Sink), image is reconstructed from the sequentially transmitted macro blocks where dropped pixels values are obtained from the chosen neighbourhood exploiting the redundancy of neighbourhood pixels. Performance of the scheme is evaluated and compared through theoretical analysis followed by simulation. The results show the present scheme´s dominance over the competing scheme in terms of both energy-efficiency while maintaining an acceptable reconstruction quality.